I added icons to directory listing of new `dir` plugin (nightly). It uses `statuscolumn` for placing icons to the left from file names.

First, drop this function somewhere in your config, for example, in `lua/core/statusline.lua`:

```
-- some helpers.
local function stl_hl(name) return string.format("%%#%s#", name) end

local space = " "
local double_space = "  "

function M.directory()
  if vim.v.virtnum ~= 0 then
    return double_space
  end

  local name = vim.api.nvim_buf_get_lines(0, vim.v.lnum - 1, vim.v.lnum, true)[1]

  local icon, icon_color
  if name:sub(-1) == "/" then
    icon = "" -- nerd icon of folder.
    icon_color = "Directory"
  else
    -- use your favorite icon provider.
    local extension = vim.fs.ext(name)
    local devicons = require("nvim-web-devicons")
    icon, icon_color = devicons.get_icon(name, extension)
    if not icon then
      icon, icon_color = devicons.get_icon_by_filetype(vim.bo[0].filetype, { default = true })
    end
  end

  return table.concat({
    stl_hl(icon_color),
    icon,
    space,
  })
end

return M
```

Second, set some options for `directory` filetype, for example, in `after/ftplugin/directory.lua`:
```
vim.opt_local.statuscolumn = "%{%v:lua.require'core.statusline'.directory()%}" -- your path to function
vim.opt_local.foldcolumn = "0"
```

The result is attached below

Icons for new `dir` plugin